2 layers47.2 × 33.6 mm

Hackeriet imponator
hackeriet/imponator
The MCU has a 100nF capacitor between VCC and GND. This is quite standard for MCUs and sensors, but to be sure, check the datasheet.
45 parts2Apache-2.0
Printed circuit boards designed in KiCad and published on GitHub, each with its parts, layers and size, its README and its files; open any of them in PCBKit.

hackeriet/imponator
The MCU has a 100nF capacitor between VCC and GND. This is quite standard for MCUs and sensors, but to be sure, check the datasheet.